class_docstr: Range Parameter optimizer.
  
  Attributes
  ----------
  value: float
  min: float
  max: float
code: def __init__(self, value, min=0, max=1):
      self._value = value
      if min >= max:
          raise ValueError("min value must be less than max value.")
      self._min = min
      self._max = max
  
label_desc: Use image node_id 1 to create a new RangeParam object  with example: obj = RangeParam(value, min, max)